Method of waterproofing leather for packing and other purposes



Patented Nov. 12, 1929 NITED STATES PATENT OFFICE JOHN J. DOUG-HTEN, OF MILLERSTOWN, PENNSYLVANIA No Drawing.

This invention relates to a method of treating leather for use as a hydraulic packing to make thesame a tight packing and at the same time provide a packing that will contain the lubricating element necessary to maintain the packing in a pliable condition and one that will operate in the stufling boxes of bearings to prevent the leakage of the liq- 'uids thercthrough.

The primary object of my invention is to provide a packing primarily adapted for use upon bearings where there is a low hydraulic head and where the shafts run at relatively high speeds, as upon the pump shaftpf an automobile and the packing of the glands of centrifugal and other forms of pumps Wherein the shaft runs at relatively high speeds and wherein the heads are relatively low. I have also obtained satisfactory results wherein my packing has been used on the piston rods of reciprocating hydraulic pumps.

My invention consists first in taking untanned, dressed kins, as of some bovine animal,-and the boiling of the hide in oils, as

lubricating oils for a period of about one hour, and the taking of the hide thus treated from the boiled oil and, the immediate immersing of the same while ina heated condi- Application filed December 11, 1928. Serial No. 325,592.

ivithin the scope of the claims which fol- What I claim is:

1. A method of waterproofing leather for packing and other purposes, consisting in first boiling an untanne'd dressed skin in oil for a period of approximately sixty minutes and then immersing the same while in a heated condition in glycerin and the curing of the same therein. 2. A method of waterproofing leather for packing and other purposes, consisting in first boiling an untanned' dressed skin of a bovine animal in a lubricating oil for a period of approximately sixty minutes and then im mersing and curing the hide thus treated in glycerin and the cutting of the hide thus treated in strips and the braiding of the same into suitable form and size f0]; placing about a shaft as packing.

JOHN J. DOUGHTEN.

' tion in a solution of glycerin or other trie atomic alcohol,- andthe curing of the same in "glycerin.

I have found best results are obtained where strips are then cut from the hide and braided for-wrapping about the shaft before. the packing gland is tightened thereupon Where the shaft is a relatively small shaft, the strips thus cut are'inade'relatively narrow,and where the shaft is'large the heavier portions of the same are cut relatively wide. A packing thus skin are used and the prepared will operate over long periods with out attention and 'ing glandabout the shaft.

i wish to be confined in the carrying out of my I -While the metliod herein outlined may .be I successfully carried out as stated, I do not will maintain a tight pack foe method to the specific method outlined, as the I result may beaccom lished by slight departures from the met from the spirit of the invention, all coming 0d without departing 

